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G. W. BLAKB. Machine for Forming Tube.

Np. 224,382. Pafemed Feb. 1o, :sem

V jih/WE: 2./ (97/ l@ UNITED STATES PATENT Onisima.,l

enonen W. BLAKE, oF NEW YORK, n; Y., AssIeNoa 'ro JOHN T. KELLY ANDcnonen M. Jonas, or PrrrsBURc, PA.

MACHINE FOR FO RMlN-G' TUBES.

' SPECIFIGATION forming part 4of Letters Patent No. 224,382, datedFebruary'lO, 1880.

' Application 'flled July 1 1, 1879.

To all whom it ma/y concem Be it known that I, GEORGE NV. BLAKE., ofthecity and State of N ew York, have inve-nted a new and useful'Improvement in Machines for Formin g Tubing, of which the following is adescription, reference' being had -to the ao duce, in a eheap and rapidmanner, by a process of stampingor swaging, tubes as above of anylength, only'limited by the length of' the plate or strip of which theyare formed,

'and of an inf'erior and cheaper quality of iron than is necessary fortheV making of sheetmetal tnbes by a drawing process.l

The invention generally consists in certain novel combinations ofdevices for feeding the plate or strip of which the tube is formed, forbreaking down said plate or strip to prepare it for being formed into atube, for subsequently closing it or forming it into a tube,and-ultimately for delivering it as a complcted tube, ali ofwhich'operations are performed successively during the passage of thestrip through the machine, 'substantially as horeinafter described.

In the accompanying drawings, Figure 1 represents a front view of amachine construct-. edin accordance with this invention. Fg. 2 is afeeding-end 'view of the same; and Figs. 8, 3",and 4 are Verticaltransverse sectional views of the swage or swage's and devicesimmediatcly connccted therewith for breaking down the strip,primarilyjshaping and closing it, and subse uently further closing andforming. or comp 'eting the tube. Fig. 5 is a detached porspective-viewof the pawl, ratchet, and pitman for Operating the Ifeed-rolls.

A is the main frame, of anysuitable construction. is a cross head orslide, carrying cross-head, and arranged'over or opposite corsresponding lower swages, D D' D2, in a basehlock, E. Said cross head orslide B -is ar- 'ra'ngedto work up and down within guid'es-b b'inthesides or uprights of. Ithe main frame, and receives its motion by orfrom a rotating crank-shaft, G, and pitman H.

I I are feed-rolls at one end of the machine,- one of which has anintermittentinotion by means of apitman', J, from a orenk-piu, c, on oneend of the shaft G, a driving-pawl, d,`and

a ratchet-wheel, 0,011 the shaft of said roll.-

Thefeeding motion of said roll takes place duringeach upstrokeof thecross-head B, each intermittent feed not excecding th'e leugth of theswages C C' C2 and ,D DS' D.

The plate'or strip S to be formed intoI a tube is introduced in a flatform between the feedrolls I I, by which it is p'as'sed in due coursethrough a guide,J', and from theuce under the first upper swage,0, and.over the 'first lower ,swage, D. These swagcs, as the cross.

head B descends, serveto break down the strip andi give it a U form, asshown' in Fig. 3, and from these swages the-benttube passes in duecourse to and through a slot-ted clearer, K, which restrains the bentstrip from being displaced by the upward motion of the swage'O, andserves to guide it to Ithe next iower swage, D', which is of slightl ysmaller interior dimensions inits transverse section than the 'firstower swage, D, and the upper second swage, C', instead of being ofconvex form like the first upper or breaking-down, swage, O, is ofeoncave shape similar to the low'er sw-age, D',

so that when the swage' G' comes down it and the s'wage D' 'give theplate a preparatory -tubular Ior closed form, as shown. The strip thusclosed next. passes to the swages G* Di, which are also of concaveshape,and serve to further form and complete the tube. These severaloperations take place successively on the strip for or oi shortportions'of its length at atime, e'quai to the lengths'of the swagesonly, the intermittentfeed of the strip occurring during the' ascent ofthe 4cross-head which carries the 'upper swages. Leaving the lastswagesO'Di, the tube into which the strip -tent feefls through themachine, for which purpese one of said delivery-mile is driven by abelt, g, passing round a pulley on the shaft of' said roll and round a.correspondiug pulley on the shaft of the driven feed-roll I.

If desire, both of 'the feed-rolls 'and both of the delivery-1-olls mayh'eve a positive motion.

The gradual pressure to which the strip is euhjeeted hy each pair'ofswages in successien med the detached arrengeiuent bf the several pairsof sweges iudirection of the feed insure the formihg of the tube withoutseverely strainiugthe metal throughout the whole leugth of the strip,while -t'ne letter Vis aceuretely guiicd end held in position by theseveral dias and feed emi delivery rolls.

To fecilitate the passage of the strip over or 'through the lower swagesand other parts it is rlesirehle to smear it withvoil before introdueingitto the machine. o o

'I claim-m- 1. The eomhinetion, with the cross heerl or slide, of eseries of iuterrupted or `detached upper sizfegescerried hy said slideand a eor- 3o respomliug series of lower swages, for operation inrelatiou. 'with the cross head or fsiide, suhs'tantially es described,ivhereby all 4the swages act simultaneously ou the strip at (lifferentpositious in the leugth of the letter as regards each pair of upper andlower swages to break down the strip and form it into a tube, as hereinset forth.

-2. The comlul'hetiou of u series of statiouury and moveble hreekingadown and forming sweges, in line with each other, with feed-rolls at one'emi of the series and delivery-rolls at the oppo'site end thereof,substantially as specifie. 3.V The eombination of the erauk-sheft G,

- the cross head or slide B, the upper breekiugtulmleir eomluetor L, undthe deliveryrolis M M, one or both of which else have a positive motion,euhstentielly es shown and. described.

GEO. W. BLA'KE. Witueesesz Hi'jser T. eows, Ferme.. Hm'ires.

